character: Amedeo Avogadro
topic: Molecular Theory Contributions
grade: 9
subject: Chemistry
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character: John Dalton
topic: Atomic Theory and its Development
grade: 9
subject: Chemistry
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character: Joseph Louis Gay-Lussac
topic: Gas Laws and Molecular Concepts
grade: 9
subject: Chemistry
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character: Robert Brown
topic: Brownian Motion and Evidence for Molecular Theory
grade: 9
subject: Chemistry
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